In this paper we describe the preliminary education program based on a digital storytelling employed before the adoption of the PBL process so that learners can smoothly carry out PBL exercise through group activities. Our practical experience of education has shown that the group activity-based PBL process requires the ability to express one’s own ideas to others (communication skill), the ability to abstract problems and develop one’s thoughts (computational thinking skill), and the ability to move ahead with tasks in a planned manner (skill to see the big picture of matters). Therefore, we gave our attention to digital storytelling as an activity that will sharpen these three skills and that lets a student complete assignments by himself or herself. This paper reports on classroom exercise into which digital storytelling activities were incorporated. According to a questionnaire survey conducted after the class, our education program received positive feedback from about 60% of the students who took the course. Meanwhile, it has been revealed that the students evaluated their own works produced using the digital storytelling techniques more strictly than the teachers expected.